# 使用while，完成以下图形的输出
'''
*
**
***
****
*****
'''
'''
i = 1
while i <= 5:
    j = 1
    while j <= i:
        print('*', end=' ')
        j += 1
    print()
    i += 1
'''
'''
*
***
*****
*******
*********
'''
i = 1
while i <= 5 * 2:
    j = 1
    while j <= i:
        print('*', end=' ')
        j += 1
    print()
    i += 2